Circuit-continuing device



Janf`7, 1930. H. A. DOUGLAS v A 1,742,850

CIRCUIT' GONTINUING DEVICE Filed may' '5, 1928 shell and obstructing turning movement of the plugwith respect to Patented Jan. 7, l 1930 UNITED STA HARRY A. DOUGLAS, 0F BRONSON, MICHIGAN 'CIRCUIT-CONTINUING .DEVICE Appiication mea May 5, 192s. seriim. 275,334.

wire enclosing conduits,

readily coupled with contact wise, may be flexible or Y otherenclosing shells where circuit connections are eEecte'd.

My .invention is of particular service in conjunction with flexible conduits which terminate in annular -shoulders and through which circuit wires extend. I provide a coupler having a portion which is engageable with such a shoulder gageable with a whereby the shell ly assembled. In the of the invention,

andwhich is also encontact enclosing shell and conduit are effectivepreferred embodiment there is a contact carrying plug within the shell, the plug and shell having engaging formations permitting the plug to move longitudinally and within the the shell. The aforesaid coupler preferably serves to engage the conduit,

the shoulder of the conduit preferably, with the plug to suitable position along the contactthereon hold the plug in a the shell to enable to be readily engaged by a complemental contact which is also within the shell. One of the contact upon'the plug, and the other contact these contacts, preferably is desirably rigid is preferablyv spring pressed into' engagement therewith.

The invention will be more fully explained in connection with the accompanying drawing in which Fig. 1

illustrates the preferred embodiment thereof, partially Ain velevation andu partially in section; Fig. 2 isa View, mainly in longitudinal section, on a larger scale than Fig. 1;

on line 3-3 of Fig. 2;

4-4 of Fig.

line 5-5 of Fig. parts in separated relation.

The shell 1 is preferably' made of spring metal. struck` from the shell. .provided with a circular hole in which theview on line tional view on Fig. 3 is a sectional View Fig. 4 is a sectional 2; and Fig. 5 is a sec- 3, but with cylindrical and Spring tongues 2 are A shell mounting 3 is shell is snugly received, this hole being margined by a shoulder 4.

The free ends of the tongues 2- are constrained to project beyond the shell, these tongues being pressed inwardly as theyypass through the opening in the mounting 3 and snapping into engagement with the shoulder 4 when they are moved beyond this shoulder. One end of the shell is closed by an insulating disc 5 which is received within notchesat this end of the shell, there being prongs 6 upon thel shell that.are clinched over the disc. The disc and tongues 2 are so spaced apart that the mounting 3 together with its shoulder 4 are snugly received/between said tongues and extended portions" 51of the disc.

Circuit conductors orwires 7 pass through the disc into the interior of the shell, the ends of the conductors that are within the shell being provided with circuit contacts 8 which may be in the form of solder. The conductors 7 pass through. hollow metallic Shanks 9 `which are provided with flanges 10 at their inner ends, the solder 8 being also applied to said flanges. Said shanks pass through tubular guides 1l which, in turn, pass through the disc 5, said tubular guides being riveted against the fiat faces of said disc. Coiled springs 12 surround the guides 11 and Shanks 9 and press the Shanks 9 and the contacts 8 forwardlyl or inwardly. A. cylindrical contacting plug 13 of insulation is received within the unmounted end of the shell 1, this plug being formed with a longitudinal groove 14' tacts are upon one side of the axis of the shell.

Said plug is provided with passages 16 which extend therethrough from end to end, contacts 17 being located at the .inner end of the yplug and held `in position by the lug 15 in alignment with the contacts 8 respectively. Circuit wires or conductors 18 extend into the passages 16 and into connection with the contacts 17, the conductors 7 and 18 being-in electrical connection through the contacts 8 and 17 when these contacts are in engagement. The conductors 18 are provided with the usu- 30 the contacts 8 and 17 respectively. The coup surrounds the inner end of the flexible coni' al insulating a lemble conduit 2O and inwardly beyond this conduit into connection with the contacts 17. Said conduit is inclusive of an annular shoulder 21 which may be in the form of an added ring which is soldered to the contiguous portion of the conduit 20 to form a unitary structure therewith. .A body portion of the ring duit. An internal annular shoulder21 is interposed between the plug 13 and the conduit, this shoulder havi g abutting enga-gement with the adjacent end face of the con- The shell is provided with bayonet slots or channels 22 which are adapted to-receive the bayonet projections 23 which are struck inwardly from the tubular cap 24 which serves as a'hollow coupler to hold the conduit 20 in assembly with the shell 1, said coupler being suitably turned for entering the projections 23 within the holding portions of the bayonet channels 22. The coupler has an end wall or `shoulder 21 of the conduit 20 against the portion 25 which engages the shoulder 21, this shoulder bearing upon the portion 25 and the plug 13. The parts are preferably so proportioned that the coupler will force the 13 and sufficiently against the pressure o the springs 12 to maintain good contact between pler may be turned not only with respect to the shell 1 into engagement with the shell, but

also with respect to the conduit 20 so as not to twist this conduit.

Changes may be made without departing from the invention. A

Having thus described my invention, I claim: l I' v The combination with a shell; of a contact .carrymg plug withinthe shell, said plug and shell having engaging formations permitting the plug to move longitudinally of and withplug; tor passes and beyond one termination of the shell and obstructing rotary movement thereof with respect to the shell; a circuit conductor terminating in a contact upon said a conduit through which said conducwhich the conductor extends into the shell; a ring surrounding and secured to said conduit termination and having an internal shoulder in abutting'engagement with the v of--the-conduit; and a Y adjacent endface hollow rotatable coupler throu h which said conductor extends into the shell and having a portion engaging said ring to Vhold it against the plug which vring is between this my name.

coupler portion and said plug and which coupler serves to hold the conduit in assembledl relation with respect to the plug.

In witness whereof, I hereunto subscribe HaRRY A. DoUGLAs.-

plug 

